Add the requested inputs
Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Home & lifestyle · Free online tool
Paint calculator
Estimate wall area, paint litres and tins from room dimensions, coats and coverage.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Paint calculator workspace
Runs locally in your browser
Result
Paint required—
Tins to buy—
Coated area—
Wall area—
Ceiling area—
Planning summary
Use it with confidence
How to use the paint calculator.
Calculate and review
Use the main action when needed. Paintable area = perimeter × height − openings. Litres = area × coats ÷ coverage per litre.
Try a worked example
Enter wall dimensions, subtract doors and windows, then add the number of coats shown on the paint tin.
Check the assumptions
Texture, colour change, application method and wastage affect coverage; round up to available tin sizes.
Helpful answers
Paint calculator FAQs.
Is the paint calculator free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this paint calculator work?
Paintable area = perimeter × height − openings. Litres = area × coats ÷ coverage per litre.
What should I check before using the result?
Texture, colour change, application method and wastage affect coverage; round up to available tin sizes.